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A motorboat, which has a speed of 5.0 meters

per second in still water, is headed east as it

crosses a river flowing south at 3.3 meters per

second. What is the magnitude of the boat’s

resultant velocity with respect to the starting

point?

(1) 3.3 m/s (3) 6.0 m/s

(2) 5.0 m/s (4) 8.3 m/s

Verified Answer :

Giovi

(3) 6.0 m/s
Using Pythagora's Theorem with the magnitudes of the two speeds you get:
\(resultant= \sqrt{5^{2}+3.3^{2}} =5.99=6 m/s\)

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